A self-elevating powershell script.

self-elevating-script.ps1

if (([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator"))
{    
  "Running as admin in $PSScriptRoot"
}
else
{
  "NOT running as an admin!" 
  Start-Process powershell -WorkingDirectory $PSScriptRoot -Verb runAs -ArgumentList "-noprofile -noexit -file $PSCommandPath" 
  return "Script re-started with admin privileges in another shell. This one will now exit."
}

"Doing this only as admin."

Smaller but not so cleaner:

$Loc = Get-Location
"Security.Principal.Windows" | % { IEX "( [ $_`Principal ] [$_`Identity ]::GetCurrent() ).IsInRole( 'Administrator' )" } | ? {
    $True | % { $Arguments =  @('-NoProfile','-ExecutionPolicy Bypass','-NoExit','-File',"`"$($MyInvocation.MyCommand.Path)`"","\`"$Loc\`"");
    Start-Process -FilePath PowerShell.exe -Verb RunAs -ArgumentList $Arguments; } }

(Get-Location).ToString()
## Any PS code that needs elevation
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